Cyclic 2-methyl-2,4-dialkoxy-3-buten-1-al-acetals, their...

Details Cyclic 2-methyl-2,4-dialkoxy-3-buten-1-al-acetals, their... Cyclic 2-methyl-2,4-dialkoxy-3-buten-1-al-acetals, their...

C - Chemistry, Metallurgy

07

D

260/353.5

C07D 319/06 (2006.01)

Patent

CA 1095061

O.Z. 32,358 ABSTRACT OF THE DISCLOSURE: New acetals, containing a 6-mem- bered ring, of 2-methyl-2,4-dialkoxy-3-buten-1-al, are obtained by reacting the corresponding 2-methyl-2-alkoxy-3-butyn-1-al-acetals with a mixture of the appropriate alcohol and an alkali metal alco- holate of the said alcohol at from 100 to 200°C. The acetals are in- termediates for the preparation of carotinoid-based physiologically safe food dyes.

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